Turret head for drill presses



Sept. 26, 1944.

G. C. SC'ATES TURRET HEAD FOR DRILL PRESSES Filed April 1, 1943 2 Sheets-Sheet 2 I INVENTOR. EQAEAM CjCATEE v Sept, 26, 1944. c sc I 2,359,161

- TURRET HEAD FOR DRILL PRESSES Filed April 1, 1945 2 Sheets-Sheet l INVENTOR. 5 14 HAN 55 1 1725 BY \1 \n AT RNEY set" at "an angle thereto.

Patented Sept. 26, 1944 UNITED. STATES PATENT OFFICE TURRET HEAD Fonn'mLL PREJssEs} Graham 0. scates, Altadena, Calif. Application Apr l 1, 194s', sr 1 No. 481,435 3 Claims. (01,. 77-25) invention relates to a turret head and more particularly to a turret head that is adapted' tobe used in connection with a drill press .and has for its main object a novel means by which to drive individual drillchucks of the tur "ret head.

7 Another object of this invention is to provide a turret head including a novel means to disengage a driving clutch means from individual chucks.

Another object of this invention is to provide in ,the specification and the accompanying drawgs, a a

This invention in its preferred form is illustrated in thedrawings and. hereinafter more fully described.

Fig. 1 is a sectional front view of a drill press turret embodying the features ofmy invention;

"Fig 2 is a side view showing a drill chuck aligned in its proper position, and

ferrederrangement of the chuck spindles. Referring to the. drawings by reference characters I have shown my invention as embodied in a turret head which is indicated generally at l l].j.As shown the head includes an upper housing ill having a lower circular base member l2 The housing also in- V Fig. 3 is abottom plan viewshowing a pretheclutch member 23 by a pin 24 arranged in the portion 23 yand sliding in aslot 25 in the portion 22. i ,1

The upper clutch member 23 has an annular slot 26 which is adapted to be engaged by the tip 21 of a shift lever 28 shown as pivotally mounted at 29. The lower end of the clutch member 23 ismovably mounted in a bearing member 3| in a bore 32 and has clutch teeth 33 on the lower end thereof which are adapted to engage clutch teeth 34 on a lower clutch member 35 in any one of a plurality of spindles 36, 3611,3611, 36c'or 36d (see Fig. 3) located in a lower housing member 31. Each spindle 36 consists of a bearing member 38 which has end bores 38 connected by a reduced bore 38" thus forming shoulders 39 the upperof which supports a washer 40 which in turn supports the lower clutch member 35. Threadedly engaging clutch member 35 and encased inbearing 36 I arrange a chuck spindle 4| which has a shoulder 42 engaging the lower shoulder 39 and thus limiting its upward movement; The upper end of the chuck spindle is reduced in diameter and threaded as at Ma to engage similar threads in the lower chuck membe'r35'. The spindle 4lhas a tapered portion 43 adapted to engage a drill chuck 44 (see Fig. 2).

The lower housing member 31 is arranged against the fiat side 45 of portion [2 of upper casing ll so that it may be rotated against the cludes a trigger supporting portion 13 shown as 4 extending perpendicular to the casing member I2. Encased. in the upper portion of housing H, and supported by a bearing member M, I provide a drive shaft l5 being held in position by a collar l6 which threadedly engages the up- IIS of an annular member 201 integral with, and

spaced from, the drive shaft'l5 to limit its downward movement. a

The space 20. between the member 20 and the drive shaft receives the upper end of a. compressionspring 2| which encircles a reduced lower portion 22 of the drive shaft I5. The lower end of the spring seats upon the upper surface of an upper clutch member 23. The

lower portion 22 of the drive shaft is keyed to 55 aforesaid upper casing and is held in place by a nut 46, which threadedly engages a post 41 on the base member I2 at 48, the post extending through a hole 49 in lower housing 31.

The nutis tightened against a shoulder 50 a in the lower housing 31 adjoining hole 49. The lower portion l2 of upper casing l I and the lower casing 31 have recesses 5| and 52 to allow clearance for the correct alignment of'upper and lower clutch members 23 and 35.

Extending from and threaded engaging portion H --(see Fig. '2) I provide a stop rod 53 which is adapted to rest against .a drill press column to prevent rotation of-the turret unit when'in operation. z

a It will be seen that rotation of the drive shaft l5-wi1l; through pin 24, drive clutch member 23 andthrough teeth 33 and 34 drive clutch member 351: thus turn spindle 43 which in turn rotates a drill chuck or other device as indicated at 44. When changing from one drill chuck to another casing member 3! may be rotated to the correct position for the desired drill chuck. The lever 28 is then released thus allowing spring 2i to depress clutch 23 and allow teeth 33 to engage the teeth of the lower clutch member of the newly selected drill chuck.

The bearing member M has a shrink fit in the housing and the bearing member 38 has a shrink fit in the lower housing 31.

The clutch members provide means for driving the spindles 4| and also provide means for holding the housing 31 in the correct position wherein the working chuck is aligned with the drive shaft.

Having thus described my invention and the present preferred embodiments thereof, I desire to emphasize the fact that many modifications may be resorted to in a manner limited only by a just interpretation of the fOllOWing claims.

Having thus described my invention, I claim:

1. A turret head for a drill press comprising a housing having a base member thereon, said housing having an axial bore and having a shoulder intermediate the length of the axial bore, the base member having a planar face the axis of which is inclined to the axis of the bore, a bearing in the upper portion of said housing bore and engaging said shoulder, said bearing having an internal flange, a drive shaft in said bearing, means to hold the drive shaft against axial movement, said drive shaft having an intermediate shoulder and having a reduced lower portion, said drive shaft shoulder engaging said internal flange, said drive shaft having an annular recess adjacent to the reduced portion, a second bearing member in the lower portion of said bore, a clutch member within the bore and slidable in the second bearing member, means for shifting said clutch member, said drive shaft having means to prevent relative rotation between said drive shaft and said clutch member, a spring in said annular recess and engaging the upper end of said clutch member, said clutch member having teeth in the lower face thereof, a rotary head on said base member, said head having an aperture therein, a bearing membe mounted in said head aperture, said bearin member having a e upper and lower bores and anintermediate reduced bore, said reduced bore providing shoulders at each end thereof, a chuck spindle having a shank arranged in said large lower bore and .having a shoulder engaging the lower. of said der intermediate. the length of the axial bore,-

the base member having a planar face the axis of which is inclined to the axis of the bore, a bearing in the upper portion ofsaid housing bore and engaging said shoulder, said bearing having an internal flange, a drive shaft in said bearing, means to hold the drive shaft against axial move- 'ment', said drive shaft having an intermediate shoulder and having a reduced lower portion, said drive shaft shoulder engaging said internal flange, said drive shaft having an annular recess adjacent to the reduced portion, a second bearing member in the lower portion of said bore, a clutch member within the bore and slidable in the second bearing member, means for shifting said clutch member, said clutch member having a pin therein, said drive shaft having a longitudinal slot receiving said pin, a spring in said annular recess and engaging the upper end of said clutch member, said clutch member having teeth in the lower face thereof, a rotary head on said base member, said head having an aperture therein,

a bearing member mounted in said aperture, said bearing member having large upper and lower bores and an intermediate reduced bore, said re duced bore providing shoulders at each end thereof, a chuck spindle having a shank arranged in said large lower bore and having a shoulder engaging the lower of said shoulders, said spindle having an intermediate cylindrical portion in said intermediate bore and above the shoulder and having a threaded upper end in said large upper bore, and a second clutch member threadedly engaging said spindl threaded portion, said clutch member having teeth in the upper face thereof.

3. A turret head for a drill press comprising a housing having a base member thereon, said housing having an axial bore and having a shoulder intermediate the length of the axial bore, the base member having a planar face the axis of which is inclined to th axis of the bore, a bearing in the upper portion of said housing bore and engaging said shoulder, said bearing having an internal flange, a drive shaft in said bearing, means to hold the drive shaft against axial movement, said drive shaft having an intermediate shoulder and having a reduced lower portion, said drive'shaft shoulder engaging said internal flange, said drive shaft having an'annular recess adjacent to the reduced portion, a second bearing member in the lower portion of said bore, a clutch member within the bore and slidable in the second bearing member, means on said housing for shifting said clutch member, said clutch member having a pin therein, said drive shaft having a longitudinal slot receiving said pin, a; spring in said annular recess and engaging the upper end of said clutch member, said clutch member having teeth in the lower face thereof, a post on said base member, a rotary head having an aperture fitting said post, means, holding said head in place, said head having spaced apertures therein, a bearing member mounted in each head aperture, each bearing member having large upper and lower bores and an intermediate reduced bore, said reduced bore providin'g'shoulders at each end thereof, a chuck spindle having a shank arranged in said large lower bore and having a shoulder engaging the lower of said shoulders, said spindle having an intermediate cylindrical portion in said intermediate bore and above the shoulder and having a threaded upper end in said large upper bore, a washer about said spindle intermediate portion, and a second clutch member threadedly engaging said spindle threaded portion and engaging said washer, said second clutch member having teeth in the upper face thereof, each spindle having an integral portion at the lower end thereof adapted ,to receive a tool.

. GRAHAM C. SCA'I'ES. 

